Unfortunately the Andreas book (McCambridge) is indexed only by place name. Any suggestions? There is a surname index on Manx Notebook, which is great for less usual names, but there are four lines of numbers for Christian (and 6 for Radcliffe - which Ian has indexed by forenames, and which also has corrections). About 100 entries for Christian.
The Andreas Visitation 1757 might help - it was printed in a FHS journal and Frances had a transcription on Manx Notebook. D.S.Dugdale (on whose research the Andreas book is based) was doing a comparison between the visitation and the list of Andreas properties in 1760-63, during the year he died. This comparison used to be on Nigel Crowe's website but I couldn't see it when I looked just now.
Along with my Christian families in Andreas I had noted that DSD had Gilbt Christian 1721-1787 & Mary Corkill with one son and three daughters aged under 16 listed between entries for The Craig and West Craig.
Sorry, not much help.
Sue